Boring implement.



No. 659,795. n Y Patented May 29, 1900.

w. T. MAxwELL s. G. J. sPAHN.

BORING IMPLEMENT.

(Application led Jan. 17, 1900.) (No Model.)

No. 650,795. Patented May 29, |900.

W. T. MAXWELL &. G. J. SPAHN.

BURING IMPLEMENT.

(Application led Jan. 17, 1900.) (No Model.) 3 Sheets--$heet 2.

W/I'NESSES 23@ A 77'OHNEYS 1m: ohms Ferns no. Pwcmumn., WASHINGTON, v.c.

No. 650.795. Patented May 29, |900. W. T. MAXWELL &. G. J. SPAHN.

BORING IMPLEMENT.

(Application led Jan. 17, 1900.)

3 sheets-swat 3.

(No Model.)

Nrrssn STATES!- WILLiAM MAXWELL ANDfe-EoReE-J. srAn, or

MARYLAND.

BALTIMORE BORING IM'PLEMVENT.

sraorrcArroN forming par@ of Letter-s patent No.'e5o,r9`5, dated tray-29, 1906;' Application inea January 17, 1900."y semina'. 1,5913. (No manToaZZ whom, it may concerns:

13e it known that we, WILLIAM T. MAX- WELL and GEORGE J. SPAHN, ofBaltimore, in the Stateof Maryland, haveinvented an Improved .BoringImplement, of which the following is a specification.

Our invention is an improved implementfor use 1n boring through joistsor in cornersv or angles where the ordinar57 brace and bit erence beinghad to the accompanying draw-V ings, in which- Figure 1 is a side viewof our improved iin-p' plement in the form adapted for boring verticallyin corners or angles. Fig. 1a vis a perspective detail View. Fig. 2 is ahorizontal section on the line 2 2, Fig. 1, the rotatable brace beingdetached. Fig. 3 isan enlargedj vertical central section of the mainportion of the implement. Fig. 4 is a perspective view of, one of theclamping-jaws of the clutch which secures the boring bit'or auger in itssocket. Fig. 5 is a side view of that form ofthe implement'which isparticularly adapted for boring joists. Fig. G is a side view of atubular detachable extension of the back bearing forsaid'im'plement.Fig. 7 is adetail section showing such extension as applied in use. Fig.8 is a longitudinal section of the back bearing for the implement. Fig.9 is a longitudinal section of a portion of the back bearing, showing adifferent position of the halves or parts of the nut which engage thethreaded boring-shaft of the implement. Figs. 10 and 11 are face viewsof the adjusting-plate and the nut for the back bearing, respectively.Fig. 12 is a face View of the main portion of the implement, showing theconstruction of a portion of the frame thereof.'

Fig. 13 is a perspective view of the oscillating bearing-block for therotatable shaft to which the brace is applied. Fig. 1i isan enlargedcentral longitudinal section of the main portion of the boring-machine,showing the back bearingadjusted in contact with parts attached to theframe. Fig. 15 is a plan viewof a portion of the frame, the boringshaftbeing in section. Fig. 16 includes per? spective views of a portion ofthe frame and parts attached thereto to provide an elastic perspectiveview showing lthe under portion or surface of the disk or plate bywhichthe halves of the nut which engage the boringshaft are adjusted inopen orclosed position. Fig. 18 is a cross-section on the line 18 18 ofFig. 5. Fig; l9is a perspective view of one of the halves of thenutwhich engages the threaded boring-shaft. Fig. 20 isva perspectiveView of a supplemental device for use in steadying vand holding theboring implement when used in an angle or corner. Fig. 21 is a detailsection of the joint of such device. Y

Referring in the first instance to Figs. 1,

v2,;and 3, avindicates a boring-bit or auger proper, and 1 a threadedrotatable shaft, in

Whose end socket said bit is held detachably by means of a clutch3,'hereinafter described. A double-faced ruiter-gear 4 is secured tosaid shaft 1 and meshes with another double-faced miter-gear 5, that iskeyed on a rotatable shaft 6.

brace 7, as shown in Figs. 1 and 5. working position of said shaft 6 isadapted to be shifted, so that it may be at an angle of aboutthirty-five degrees, Fig. 1, or at a right angle, Fig. 5, as the casemay be, tothe driven shaft 1 and bit n, These two positions or anglesadapt the implement to be used with the bit a vertical-say in a corneror like angle of a. frame or roomas shown in Fig. 1, and alsohorizontally between joists, as in Fig. 5.

The threaded shaft 1 is guided and works in a smooth bore 42 in theskeleton frame 8. When the implement is worked in vertical position,Fig. 1, we employ a device for holding, supporting, and guiding it aswell as pressing it downward with due force. The

same consists of a tube 9 or a rod having `a lengthwise socket in itslower end to `receive the threaded portion of said shaft 1, project-4"ing above the frame S. The upper end of The latter has a. taperedsquared. ,head adapted for application of an ordinary The;

lcontact for the lback bearing. Fig. 17 is a IOC this holder and guide 9has a handle 10, that projects at a right angle, while the lower end ofthe same is provided with notches forming fingers 11,(see Fig. 1,)thatare adapted to lit over and engage the frame 8 on each side of the shaft1, as shown in Fig. 3. The object of this construction is to enable theoperator to hold the frame 8 vertical and prevent rotation or lateralmotion of the same while the implement is being worked. As a further orsupplemental means for this purpose we propose to employ the bifurcateddevice shown partly in Figs. l and 2 and fully, but detached, in Fig.20. This device is designed for contact with the leg of the operator. Itconsists of two parallel arms 12, which are constructed integrally witha third arm 13, extending in the opposite direction, but arranged in thesaine plane. A second arm 13, corresponding to arm 13 in form, isarranged opposite the latter and detachably connected with it and thearms 12 at their juncture by means of a pivot-screw bolt 14, having athumb-nuekl, whereby the parts may be clamped together. The meetingsurfaces of said parts are serrated, as indicated in Fig. 20, to.prevent them sliding on each other when the arm 13 is adjusted or set inany required position relative to the fixed arm 13. The arms l2 arespaced apart, so as to embrace the sides of frame 8 (see Fig. 2) andprovided at their free ends with semicircular notches 12 (which arepractically hooks) to adapt them for engagement with the peripheralgrooves 16 of pins or bolts 17, Figs. 1, 2, and 18, that serve astrunnions or pivots for the shiftable box or bearing 19 in which thebrace-shaft 6 is mounted. Such grooves 1G are formed by and betweenparallel flan ges of the pivot-pins, and the inner lianges abut thesides of frame 8. The arms 12 have interior shoulders 12b, Fig. 20,which are arranged for frictional engagement with the eccentric endportions or cheeks S of the frame 8, as shown in Figs. 1 and 2--tl1at isto say, to`apply the supplemental device for holding and steadying theboring implement proper the hooks 12n of arms 12 are placed under thepivot-pins 17, and the shoulders 12b are then forced down on theeccentrics 8, so as to lock therewith by friction. It is apparent suchengagement may be easily and quickly released by upward pressure on thebifurcated device orimplement-holder. The outer arms 13 and 13 of thelatter are designed to embrace the knee or the adjacent portion oftheleg of the operator as he kneels on the floor in front of theimplement when using it. It is apparent the pivoted arm 13a allows thespace between it and the fixed arm 13 to be widened or narrowed', asconditions may require. j

The bearings for the brace-shaft 6 are constructed as follows:Referringparticularly to Fig. 3, it will be seen that the elongatedjournal 6 of said shaft fits in a thick sleeve or bushing 18, whichfitted loosely in the oscil latory bearing-block 19. The opposite sidesof the latter are provided with shallow diametrical sockets to receivethe smooth cylindrical inner ends of the pivot-pins 17. (Shown best inFig. 1S.) The sleeve 18 has a lateral flange at the end adjacent to thecollar G" on shaft G, and small balls 2l, Fig. 3, are interposed betweenthem to mainly relieve the friction due to pressure. Similar balls 22are arranged at the other end of the sleeve 18, between it and the gear5. The said sleeve is adapted to slide lengthwise in the block 19, suchmovement being limited by the stop-pin 2,3, that lits in a longitudinalslot 24. This movement of the sleeve 18 is required in order to allowthe shaft 6 to be shifted from the angle (thirty-five degrees) shown inFigs. 1, 2, and 3, to that (ninety degrees) shown in Fig. 5, sinceotherwise the gears 4 and 5 could not be alternately engaged andrengaged as required. The clamp-screw 25, Fig. 3, having an enlargedmilled head, passes through a hole 26, Fig. 13, in the oscillatory block19, and its inner end enters a slot 27 in the sleeve 1S, Fig. 3, andalso a hole at the `lower or inner end of such slot, when the gears 4 5are placed at an oblique angle. By reversing the screw 25 its inner endwill free the slot, and then the sleeve 18l may be slid 4outward tobring the gear 5 out of engagement with gear 4, when the bearing-block19 is free to rotate on its pivots 17 far enough to bring it to a rightangle with the boi'ingshaft l, as shown in Fig. 5, which being done theshaft G and its sleeve 18 are pushed inward to carry the gear 5 againinto mesh with gear 4. To hold the parts in this position, thescrew 25is screwed in again, so that its point bears on the shoulder 28 in theslot 27. The mitm-gear 4, attachedto the bit-shaft, has an obtuse-angleedge, and the two bevels thus formed are provided with teeth ofdifferent pitch, because formed on different pitch diameters or circles.In other words, the teeth 4a on the upper side of gear 4 are formed on apitch-circle of less diameter than the lower or shorter teeth. The othergear 5 is adapted to mesh with said gear 4 when the brace-shaft G isplaced at an angle of forty-five degrees to the bit-shaft, as shown inFig. 1, or at ninety degrees thereto, as shown in Fig 5. 'lo pro- 'videfor such engagement, one of the bevelfaces-to wit, 5b of gear 5-isprovided with teeth having the same pitch and inclination as the longerteeth of gear 4. The other or .shorter bevel 5n of the gear 5 has butslight inclination, and therefore a very obtuse an,-

gle to the inner bevel 5i, and its teeth have a different pitch, becauseforlned on a greater pitch-diameter. Their pitch and inclinationcorrespond to the shorter teeth of gear 4, with which they mesh, as inFig. l. Thus, unlike gear 4, the two sets of teeth on gear 5 are notmerely of diderent pitch and inclined at different angles, but inclinedin the same general direction, or, to put it in other terms, iu gear 5the two bevels face in the same geu- ICO IlO

eral direction, while in opposite directions. v l Y When the implementis usedrbetween j oists, as shown in Fig. 5, we employ a back bearing28, (see Figs. 5 and 8,) whose main features are substantially such asshown and described in 1nyapplication,Serial No. 723,185, beforereferred to. containing a spiral spring 29 and a slidable tube 30, whichis interposed between the spring and the. two halves 31 of -a nut, whichare loosely attached by screws 32 to the Iiaredend of the cylinder 28.The said screws pass through andare adapted to slide in slots 28a, asshown. These half-nuts-3l are held apart by spiral springs 33, Fig. 11,which are arranged concentrically, as shown in Fig. 1-1. One end of eachspring 33 isy attached to and bearsagainst one half-nut 31, and theother abut-s a lip `or iiange 34, that projects inward from therotatable locking plate or disk 35. The two flanges 34 may be formed bystriking them out of the body of the disk 35 by means of dies. Thelatter is loosely attached to the half-nuts 31 by screws 36, that workin right-angular slots 37. .When the disk or plate 35 isrotativelyadjusted, as shown in Fig. 8, the screws 36 are in the outer ends ofslots 37, and the half-nuts 31 are pressed apart by the spiral springs33 and stand at a slight angle to each other, being consequently freefrom thescrewfshaft 1. This position will, obviously, allow the backstay28 to be slid freely on the shaft 1, so that it may be quickly adjustedtoward or from the frame 3, as conditions require. When pressure isapplied against the face of disk35, it is apparent that half-nuts 31will be forced back into the flared end ofcylinder 28 and broughttogether, as

gear 4 they face in in Fig. 9, so that theircoincident threads engagethose of shaft 1. Then the disk 35 is rotated to bring the screws 36into the inner ends of the slots 37, whereby the half-nuts 3l are lockedin the closed position and will remain so until said disk is rotated inthe opposite direction, when, the screws being free to slide outward inthe slots 37 the pressure of the springs will again force the nuts 3lapart.

If the disk 35 were allowed to come in contact with the frames 8when'the backstay 28 is slid up on the shaft 1, it would frequentlyhappen that the parts 31 of the nut would not catch or engage the threadof the shaft properly, and the heads of screws 3G would also come incontact with the frame. To avoid these results, we provide aspring-pusher, which is so applied to the frame as to exert backpressure on thev disk 35 when slid up, as in Fig. 14. It consists (seealso Figs. 15 and 16) of a plate 38, having a central opening 39 for theshaft 1 and parallel pins or studs 40 on 'its inner or Linder side.These pins 40 enter sockets 41 in the edge of frame 8, which are locatedon opposite sides of the hole 42, through which the shaft 1 passes.Cross-pins 43 or other means may be used to It consists of a sleeve orcylinder vshaft 1.

secure the pusher from detachment.' Spiral `springs surround the pins 40in the sockets Y Vhen the backstay 28 is slid up and the disk 35contacts with the pusher 38, the latter resists, and thus the half-nuts31 are forced inward and caused to properly engage .the threads ofshaft 1. The central thickened portion of the pusher 38, whichconstitutes an annular rib on the sa me, rides or slides on the disk 35if the latter be rotated to lock or unlock the screws 33 and half-nuts31.

We show in'Figs. and 7 an extension-backstay 44 applied to 28. Its frontend is provided with lengthwise slits, forming thus spring-fingers 45,which have slight rinturned flanges 46 at their outer ends. When the eX-tension 44 is slid onto 28the elasticitypf the fingers 45 permits themto pass over the annular ribs on the latter, and their flanges',

46 enter the grooves 47 intervening the ribs, and thus engage thelatter, as shownin Fig.

7. Then a compressing-ring 48 is slid llp'rOnj the `fingers 45 and locksthem by friction,'so

that the two backstays 28 and 44 are rigidly connected.

If the space between joists requires itw e employ a backstay 49, whichis longer than'r44L and which may be applied to 28. vIn case all threebackstays are used the backstay 49 is first applied Vto 28, and then44`is lapplied j IOO The construction and attachment of thebit-clutchare as follows: The cylindrical body 3 of the clutch (see Fig. 3) has athreaded opening or hole adapted to receive the Aenlarged threadedlsocket end of the rotatable The outer or lower end ofthe part 3 is madeconical and provided with lengthwise slots. Jaws 50 are adapted to slidewithin such conical port-ion and to'engage the shank of the bit justbelow its square por-V, tion. y attachment for the jawsv 50 and areadapted to slide in the slots of part 3. body 3 is screwed upon thethreaded socket 1, the'jaws 50 come in contact with the'outer Y end ofsaid socket and lare thereby forced downward and inward, so as toembrace and support the bit.

WVhat we claim is f 1. In a boring implement, the combination IIO Screws51 constitute a means of loose V,

When the izo with the frame and a rotatable,bit-carryingl n shaft, of arotatable and longitudinally-slidable brace-shaft, and two meshingmiterone of said'gears having teeth arranged in op-l posite directions,and the other havingrtwo -sets of teeth inclined in the same direction,

but at a less angle, a bearing for suchbraceshaft which is pivoted andadapted to swing in the frame, and means for clampingy said shaft ineither of the two angles to which it -may be adjusted, substantially asshownand described. i

2. In a boringimplement, the combination gears applied to and connectingsaid shafts, I

ISO

be adjusted, and two double-face mitcr-gears i adapted to engage in suchpositions, substantially as shown and described.

3. In a boring implement, the combination with the frame andbit-carrying shaft, of a brace or driving shaft, a sleeve in which saidshaft is adapted to rotate, a bearing-block in which the sleeve slides,and which is pivoted in the frame, and means for clamping the saidsleeve and holding it in either of the two positions to which thedriving-shaft may be adj usted, substantially as shown and described.

4. In a boring' implement, the combination with the frame andbit-carrying shaft, of a driving-shaft and ruiter-gears connecting thesame,a longitudinally-sld'able sleeve in which the driving-shaft has itsbearing, the same having a lengthwise slot provided with a shoulder,bearing-block hung on fixed pivots, and wherein said sleeve is adaptedto slide, and a clam p-screw passing through said bearing and adapted toenter the slot in the sleeve and to serve as a clamp and stop therefor,substantially as shown and described.

5. In a boring implement, the combination with a bit-shaft having aruiter-gear provided with two sets of teeth inclined in oppositedirections to the axis, of a brace-shaft pivotedv and adapted to be setat different anglesY to the bit-shaft, and a miter-gear keyed on suchbrace-shaft and having two sets of teeth of different pitch inclined inthe same general direction, but at different anglesto such axis,-substantially as shown and described.

G. In a boringimplement, the combination with a frame,a bit-carryingshaft, a braceshaft adapted tobe shifted from one angle to another',miter-gearsv applied to the respect-'iveV shafts, one of said gearshaving bevels facing in opposite directions its teeth being continuouson the two bevels, and the other gear having bevels facing in the samegeneral direction, there being a greater number of teeth on one bevelthan the other, substantially as shown and described.

7. In a boring implement, thecombination with a suitable frame, arotatable bit-carrying shaft and a driving-shaft 6, gearedy therewithand adapted to be operated atan angle thereto, of a detachable supportand holder 9, which is adapted to be placed over the bitcarrying shaftand constructed at its lower end with opposite jaws which are adapted to-embrace a portion of the frame so that said holder is held rigidlyalined with the bitshaft,-substantially as shown and described.

8. Ina boringimplement, thecombination witha frame and a boring anddriving shaft arranged therein of a supplemental supporting device whichis provided withv arms 8 adapted for being detachably engaged with saidframe and with other arms or branches 13 and 13a which are curved andextended laterally opposite each other and thus adapted to receive, orembrace, thel leg of the operator, said device extending laterallybeneath thel brace-shaft as shown and described.

9. In a boring implement the combination with the frame'having eccentricend portions and bit carrying and driving` shaft-s of a supplemental4supporting devicel having arms adapted for detachable engagement withlateral projections of the frame, and' with other parts adapted forsliding engagement with the device may be' held in due working positionby friction, substantially as shown' and described.

10. n a boring implement the combination 1 with theframe and shaftsarranged therein of the supplementalv supporting device adapted' forldetachableV engagement' with' said frame and having arms or branchesadapted to c11- gage the leg of the'operator, one of said arms beingadjustable toward or'from the' other',` and means for securing' the samein any ad justinent, substantially as shown and described".

11. Inaboringimple|nent,thecombination,

j with the frame and shafts arranged therein, of thesupplemental-supporting device adapted for/detachableengagement withsaid frame and having'arms" or branchesa'da'pted to enl gage'v the ,1e-gof the operator, one ofv said arms' being adjustable toward or from theother, andv means for securing the same in any adjustment, substantiallyas shown and described. g

l2. Inaborngimplement the combination, with a frame and rotatablebit-carrying shaft said parts and tending toforce them asunder,substantially as shown and described.

13. In a boringimplement,the combination, with the frame and abit-carrying'shaft haved to engage the samelandformed in two parts,spiral springs attached to said parts and arranged in sockets therein,for the purpose'of forcing'them asunder, and a backstay or supporthaving a flaring mouth adapted to engage the bevel side of the nut,substantially as shown and described. A

14. Ina boringimplement,th'e combination with the. frame and rotatablebitcarrying shaft havinga screw-thread, of albackstay or support for theimplement, a dividedy nut whose par-ts are adapted to engage the threadof said shaft and provided with sockets,- spiral springs arranged insaid sockets and tending to force the partsof-the nut asunder, a plateor disk loosely'secured tothe parts of the nut by means of screws andprovided with IOO IIO

ing ascrew-th read as specitied,ofa nut adaptlips or anges adapted toenter the sockets in the nut and to act against the springs forcompressing them when rotated backward, substantially as shown anddescribed.

l5. In a boringimplement,the combination, with the frame and rotatablebit-carrying shaft having a screw-thread, of a backstay or support forthe implement, a divided nut Whose parts are adapted to engage thethread of said shaft and providedwith sockets in their faces, spiralsprings arranged in said sockets and tending to force the parts of thenut asunder, a rotatable plate or disk loosely secured to the faces ofthe half-nuts and provided with right-angular slots, screws passingthrough said slots and entering the half-nuts, lips or Ilangesprojecting from the under s ide of said disk and engaging the free endsof the spiral springs, the nuts being beveled and adapted to engage thedaring end of the backstay, substantially as shown and described.

16. In a boringimplement,the combination, with the frame and ascrew-threaded bit-early ing shaft, of a backstay, a divided nut appliedthereto and a spring for separating them as specified, of aspring-pusher or pressing device applied to said frame and adapted toengagel or press upon the nut, for thepurpose of forcing its parts inthe proper engagement with the threaded shaft, when the backstay is slidtoward the frame, substantially as shown and described.

17. In a boringimplement,the combination with the frame having socketsas specified, and the bit-carrying shaft adapted to rotate in said frameand screw-threaded as specilied, of a backstay and nut formed in twoparts and adapted to Work on t-he threaded shaft,a spring or springstending to force the parts of the nuts asunder, a rotatable disklooselyengaged with said parts of the nut, and adapted to compress the springwhen rotated, a spring-pusher consisting of a plate adapted to bearagainst said disk and having pins which enter the aforesaid sockets inthe frame, and spiral springs encircling said pins in the sockets,substantially as shown and described.

18. In a boring implement,the combination, with a frame, a bit-carryingshaft, and a driving-shaft geared therewith, of a backstay adapted to beapplied to the bit -carrying shaft and provided with a nut for workingon the threaded portion of the same, and an eX'- tension backstay havinga tubular body, adapted to receive the first-named backstay, andprovided with spring-fingers adapted to engage depressions or grooves inthe firstnamed backstay, and means for clamping the fingers therein,substantially as shown and described.

WILLIAM T. MAXWELL. GEORGE J. sPAHN.

Witnesses:

LoUIs J. G. STROTT, JOSEPH RYSANCK.

